One Day at a Time follows a Cuban American family in Los Angeles, centering on Penelope Alvarez, a Army veteran nurse, and her children Elena and Alex. This profile outlines the principal cast and the characters portrayed across the series, offering a durable reference for viewers. The core cast includes Patricia Velásquez as Schneider, Isabela Merced as Elena, Marcel Ruiz as Alex, and Todd Grinnell as Nate. The show balances everyday family life with broader topics such as identity, mental health, and culture. Below are the principal actors, their roles, and other notable work that define their careers to date.
